Paper-making machine



April 28, 1931- c. w. VALENTINE PAPER MAKING MACHINE Filed Nov. 22, 1929Patented Apr. 28, 1931 UNITED STATES PATENT OFFICE CHARLES W. VALENTINE,OF WATERTOWN, NEW YORK, ASSIGNOB TO THE BAGLEY AND SEWALL COMPANY, OFWATERTOWN, NEW YORK, A CORPORATION OF NEW YORK PAPER-MAKING MACHINEApplication filed November 22, 1929. Serial No. 408,956.

This invention relates to certain improvements in Fourdrinier papermaking machines, and particularly to an improved slice construction bywhich the supply of pulp to the making wire of the machine is properlycontrolled.

- In making paper on a Fourdrinier machine, the pulp 'or stock isdelivered from the head box ontothe making wire under an adjustable 1mechanism known as a slice. In order to se cure the proper formation ofthe paper web, it is necessary that the web or sheet be of uni-, formthickness across its entire width without weak spots or otherimperfections. The

5 obtaining of a web of uniform thickness has been effected byprovidinga slice having a flexible or adjustable edge or lip which canbe so adjusted that the opening between the slice and the wire is thesame height widthgo wise of the machine, such construction beingdescribed and claimed in my prior patent No. 1,619,168, dated March 1,1927, and this construction has been very effective for certainqualities of paper, such as news or kraft. For certain other and finerqualities of paper,

such as bond paper, while the use of the adjustable lip or edge givesgood results, this construction alone does not give as muchintel-meshing or intermingling of the fibres on the wire as will producethe most satisfactor sheet or web.

t is the particular object of the present invention to combine with theslice having the adjustable lip or edge a secondary or additional slicespaced from the main slice, the action of this secondary slice, whenused with the adjustable lip. feature of the main slice an-interminglingor intermeshing of the fi er's such as will produce a very satisfactorysheet or web of the finer qualities of paper, this being particularlyeffective in the wide, high speed machines such as are now common yused.

It is a further object of the invention to provide such a constructionin which the secondary slice may be readily adjusted independently of orrelatively to the main slice and in which this secondar slice may, i

. desired, be readily and quick y moved out of 3 the way, so that ifdesired for any purpose the machine can be run as a single slicemachine.

A further object of the invention is to produce such a construction offew parts and which can be operated in a simple and quick manner toeffect the desired adjustments.

With these and other objects not specifically referred to in View, theinvention consists in certain novel parts, arrangements and combinationswhich will be described in connection with the accompanying drawings andthe novel features pointed out in the claims hereunto annexed.

In the drawings, which show a preferred embodiment of the invention, 65Figure 1 is a partly broken awa partly sectional top view of the improvmechanism;

Figure 2 is a front view of the construction shown in Figure 1, and

Figure 3 is a central vertical sectional view, the section being takenon line 3-3 of Figure 2.

Referring now to these drawings, the breast roll and part of the maln'ngwire of a Fourdrinier machine are illustrated, the rest of the machinebeing omitted as unnecessary for an understanding of the invention, suchmachine being well known in the paper making art. This breast roll ismarked 1 and the making wire which passes over this roll is marked 2.The pulp is delivered from a head box, the sides 3, 4 of which are shownin Figure 2, and the pulp is delivered from this box onto the makingwire under a slice mechanism of improved construction hereinafterreferred to.

This slice, in the construction illustrated, co-

operates with an apron board 5 forming art of the bottom of the headbox, between w ich and the lower edge of the slice the pulp or stock isdeliverd to the wire, the apron board extending, as shown, partly overthe wire and the breast roll.

' The slice construction includes a main slice, indicated generally bythe numeral 6, and an auxiliary or secondary slice, hereinafter morefully referred to. The main slice 6 is in the form of a metal plate 7,which extends across the front of the head box and is provided withreinforcing ribs 8. This mm m slice is provided with a lower flexible oradjustable edge or lip 9, and the construction and the operation of thismain slice may be and preferably is generally like the construction andoperation shown in my prior patent above referred to. p The plate 7 ismounted for vertical movement in side guides 10, one of which is shownin Figure 1, this main slice being vertically adjustable as a whole bymeans of hand wheels 11, 12, through suitable connections, not necessaryto describe. By these hand wheels, the slice as a whole maybe raised orlowered to provide the desired opening between the slice and thecooperating wire. The adjustable lip or edge 9 may also be adjusted bymeans of hand wheels 13 and rods 14 disposed at suitable intervals alongthe front edge of the slice.

In accordance with the invention, there is combined with this main slicea secondary slice, this secondary slice being arranged in the head boxbehind the main slice and spaced therefrom, and this secondary slice isarranged so that it can be adjusted to and from the apron boardindependently of the main slice, so that a suitable opening may beformed between the lower edge of the secondary slice and the apronboard. This construction, when taken in combination with the main sliceand its adjustable lip, effects an interming'ling or intermeshing of thefibers which enables the production of a good web with stock of suchcharacter as is diflicult to form a sheet from by the use of the mainslice alone.

While the secondary slice and the means for adjusting it may be varied,as shown, this secondary slice is in the form of a plate, preferably ofmetal, marked 15, which extends across the machine and is free to slidevertically in uides 16 formed in the sides of the head boxfiieforereferred to, and this slice is preferably formed on its lower edge withan enlarged portion or bead 17. This slice 15 is further provided withstiffening ribs or flanges 18 which are secured to the slice and extendoutwardly against the back of the plate 7 of the main slice 6, butarranged so that they are free to slide against the plate 7.

While the means-for adjusting the secondary slice 15 may be variedwithin certain limits, these adjusting means are such that the secondaryslice may be adjusted independently of the main slice. In the particularconstruction illustrated, there is provided a central screw rod 19 whichcarries an operating hand wheel 20. This screw rod passes through athreaded section 21 on one of the strengthening ribs 18, before referredto, and

this screw rod is secured to a block 22 on a top bar 23 of the mainslice 6. By operating the hand wheel 20, the slice 15 may thus be raisedor lowered relatively to the main slice. If desired, for obtaining afiner adjustment or leveling up the position of the secondary slice 15,adjusting screws 24, 25, operated by hand wheels 26, may be provided ateach end of the slice, so that after the slice has been roughly adjustedby the hand wheel 20 it can be evened or leveled up by the hand wheels26.

In the operation of the device, the slice as a whole, both main andsecondary, is adjusted by means of the hand wheels 12, so as to giveapproximately the same opening between the slice 6 and the slice 15 andthe apron board and the makin wire. The front or main slice is then adusted, by adjusting its adjustable lip or edge, to give the desiredopening for the pulp which is to be fed onto the making wire, and thesecondary slice is then adjusted so as to provide an opening between itslower edgeand the apron board which is a little deeper than the o eningbetween the front or main slice and t e wire, this having been found inpractice to give the desired intermingling or intermeshing of the fibersof the stock.

If it be desired to operate the slice as a single slice, as may bedesirable in the production of certain qualities of paper, the secondaryslice may be moved up out of the way, by means of the hand wheel 20, sothat it has no effect on the pulp passing under or through the mainslice.

With the construction shown and described a very simple and effectivecontrol-of the feed of the pulp to the making wire has been effected,and a ood sheet may be produced from stock whic would be difficult tohandle with the use of a single slice, the various parts of the slicecooperating to produce a good sheet under the conditions above setforth.

While the specific mechanism shown for effecting the objects of theinvention is. a preferred one, it will be understood that variouschanges may be made in the specific construction and arrangement of theparts without departing from the invention as defined in the claimshereunto appended.

What is claimed is: 1. In-a paper making machine, the combination withthe head box and the making wire, of a main slice having an adjustablelip or edge, a second slice spaced from the main slice, means for movingthe slices to- 2. In a paper making machine, the combination with thehead box and the making wire, of a main slice having an adjustable edgeor lip, a second slice movable with and arranged behind the main slice,means for adjusting the second slice relatively to the main slice, andmeans for leveling up the secondary slice.

3. In a paper making machine, the combination with the head box and themaking wire, of a main slice having an adjustable lip, a second sliceconnected with the main sliceand movable therewith, and means for adjusting the second slice independently of the main slice.

4. In a paper makingomachine, the combination with the head ox and themaking wire, of a main slice and means for adjusting it, a second sliceconnected to move with the main slice and spaced therefrom, and meansfor effecting an adjusting movement of the second slice relatively tothe main slice.

5. In a paper making machine, the combination with the head box and themaking wire, of a main slice having an adjustable lip or edge, a secondslice spaced from the main slice, a screw rod'carried by the main sliceand connected with the second slice for adjusting the latter, and meansfor manipulatmg the rod to adjust the second slice independently of themain slice.

6. In a paper making machine, the combination with the head box and themaking wire, of a main slice having an adjustable lip or edge, a secondslice spaced from the mam slice, a screw rod carried by the main sliceand connected with the second slice, means for manipulating the rod toadjust the sec ond slice independently of the main slice, and separatescrew rods for leveling up the second slice.

7. In a paper making machine, the combination with the head box and themaking wire, of a main slice having an adjustable lip or edge, a secondslice spaced from the main slice and movable therewith and means formoving the second slice out of the way so that the machine may operateas a single slice machine.

In testimony whereof, I have hereunto set my hand CHARLES W. VALENTINE.

